Hello all from Las Vegas. I purchased a sonic RS it came with the GMPP lowering suspension, and I just last week installed the GMPP exhaust and tune for sonics.
Stock is so overrated! He can save your stock tune for you. Once you've driven your car with a tune you may never go back. Have someone video you the first time you drive it with a tune. You'll have the biggest grin. Lol
Update: Quickie tune (no dyno) $250, full dyno tune $450. We need 3 people to get a dyno session and so far it's just 2 of us. As soon as we get a 3rd person we can schedule it.